Printer control circuit

Details Printer control circuit Printer control circuit

1980-12-30

1982-08-03

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

Stylus feature

400279, 400320, 400323, G01D 1524

Patent

active

043430120

ABSTRACT:
Circuit for generating from a pair of pulse trains produced in phase quadrature both an indication of the direction of print head motion and the production of timing signals from the leading and trailing edges of the pulses of only one of the two pulse trains. A pair of transducers is used to sense a timing disk rotating in synchronism with the movement of a carrier for a plurality of print elements moving along a print line which transducers are generating respective output pulse trains which are in phase quadrature relation to the other. The circuit provides timing signals for controlling the energization of the print elements at print positions along the print line and retains the same polarity for printing in either direction.

REFERENCES:
patent: 4037230 (1977-07-01), Fujimoto et al.
patent: 4176977 (1979-12-01), Shepard, Jr.
patent: 4195938 (1980-04-01), Velazquez
patent: 4225251 (1980-09-01), Klimek et al.
patent: 4285606 (1981-08-01), Giacone

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